DTC No. P2127-00 Accelerator Pedal Position Sensor 2 Circuit Low

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC set in memory for the item monitored below)

Not applicable

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS

Logic Flow Chart

Check Condition

The PHEV-ECU power supply voltage is 9.0 volts or more.
EV power source relay drive signal is ON

Judgment Criterion

The accelerator pedal position sensor (APPS) (sub) voltage is less than 0.15 volt for 1 second or more.

OBD-II DRIVE CYCLE PATTERN

Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.

TROUBLESHOOTING HINTS

Damaged wiring harness and connectors
Malfunction of the accelerator pedal (accelerator pedal position sensor 2)
Malfunction of the PHEV-ECU

DIAGNOSIS

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991223: Wiring harness set
MB992006: Extra fine probe

1.Voltage measurement at accelerator pedal connector (APV2 terminal)

(1) Disconnect the connector, and measure at the wiring harness side.

(2) Change the power supply mode of the electric motor switch to ON (READY indicator: OFF).

(3) Measure the voltage between the accelerator pedal connector (APV2 terminal) and body ground.

OK: Approximately 5 V

Is the check result normal?

2.Check of short to ground circuit and open circuit in APV2 line between PHEV-ECU and accelerator pedal

Is the check result normal?

Repair the connector(s) or wiring harness. Then,

3.Check of short to ground circuit and open circuit in APS2 line between PHEV-ECU and accelerator pedal

Is the check result normal?

Repair the connector(s) or wiring harness. Then,

4.Voltage measurement at PHEV-ECU connector (APS2 terminal, APG2 terminal)

(1) Measure the PHEV-ECU connector side by backprobing.

(2) Measure the voltage between the PHEV-ECU connector (APS2 terminal) and PHEV-ECU connector (APG2 terminal).

Check condition	Normal condition
Accelerator pedal: Fully released	Approximately 0.39 V
Accelerator pedal: Fully depressed	Approximately 2.3 V

Is the check result normal?

Replace the accelerator pedal (Refer to Engine Control - Accelerator Pedal ACCELERATOR PEDAL REMOVAL AND INSTALLATION

). Then,

5.Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE

(2) Check the DTC.

Is the DTC set?

Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION

). Then,

The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS

6.Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE

(2) Check the DTC.

Is the DTC set?

Retry the troubleshooting.

The procedure is complete.